﻿// Copyright (c) 2010. Eric Nelson  
// https://code.google.com/p/prompts/
// All rights reserved.
//     
// Redistribution and use in source and binary forms,   
// with or without modification, are permitted provided   
// that the following conditions are met:    
// * Redistributions of source code must retain the   
// above copyright notice, this list of conditions and   
// the following disclaimer.    
// * Redistributions in binary form must reproduce   
// the above copyright notice, this list of conditions   
// and the following disclaimer in the documentation   
// and/or other materials provided with the distribution.    
// * Neither the name of Eric Nelson nor the   
// names of its contributors may be used to endorse   
// or promote products derived from this software   
// without specific prior written permission.    
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND   
// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,   
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF   
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE   
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR   
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,   
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,   
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR   
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS   
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,   
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING   
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE   
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF   
// SUCH DAMAGE.
// 
//     
// [This is the BSD license, see  
// http://www.opensource.org/licenses/bsd-license.php]  
using System;
using Prompts.Prompting.Construction;
using Prompts.Prompting.Model;
using Prompts.Prompting.ViewModels.Search;
using Prompts.Service.ReportExecution;
using GetChildrenFor2CompletedEventArgs = Prompts.Prompting.Model.GetChildrenFor2CompletedEventArgs;

namespace Prompts.Prompting.ViewModels.Implementation
{
    public class ChildPromptItemService : IChildPromptItemService
    {
        private readonly IChildPromptLevelServiceClient _childPromptLevelService;
        private readonly IPromptItemCollectionBuilder _promptItemCollectionBuilder;

        public ChildPromptItemService(IChildPromptLevelServiceClient childPromptLevelService, IPromptItemCollectionBuilder promptItemCollectionBuilder)
        {
            _childPromptLevelService = childPromptLevelService;
            _promptItemCollectionBuilder = promptItemCollectionBuilder;
            _childPromptLevelService.GetChildrenFor2Completed += OnGetChildrenForCompleted2;
        }

        public void GetChildrenFor(string promptName, string parameterName, string value, Action<ISearchablePromptItemCollection> result)
        {
            var helper = new GetChildrenHelper(promptName, result);
            _childPromptLevelService.GetChildrenFor2Async(
                promptName
                , parameterName
                , new ParameterValue {nameField = parameterName, valueField = value}, helper);
        }

        private void OnGetChildrenForCompleted2(object sender, GetChildrenFor2CompletedEventArgs e)
        {
            var helper = (GetChildrenHelper)e.UserState;
            var promptItems = _promptItemCollectionBuilder.CreateSearchablePromptItems(helper.PromptName, e.Result);
            helper.CallBack(promptItems);
        }

        private class GetChildrenHelper
        {
            private readonly string _promptName;
            private readonly Action<ISearchablePromptItemCollection> _callBack;

            public GetChildrenHelper(string promptName, Action<ISearchablePromptItemCollection> callBack)
            {
                _promptName = promptName;
                _callBack = callBack;
            }

            public Action<ISearchablePromptItemCollection> CallBack
            {
                get { return _callBack; }
            }

            public string PromptName
            {
                get { return _promptName; }
            }
        }
    }
}